<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>初识vue</title>
    <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
</head>
<body>
   <div id="app">
       {{message}}
   </div>

</body>
<script>
    var app =new Vue({
        el: "#app",
        data: {
            message:"hello",
        }

    });
</script>

</html>